Why Do Implants Fail?

Failed implants most often occur when the implant does not integrate with the jawbone as desired after placement. Triggers for this condition include systemic diseases the person may have, incorrectly performed implant procedures, or the presence of infection. Furthermore, symptoms such as post-implant pain, gum problems, difficulty chewing, and bad breath can indicate implant failure.

What is a Failed Implant?

Implant failure occurs when the expected bone integration and function cannot be achieved after placement. If the implant cannot sufficiently integrate with the jawbone, it loses its function. Consequently, this leads to the patient experiencing post-implant problems. Implant non-retention can be noticed in the first few days after placement, as well as years later. Therefore, in such cases, the person needs to undergo additional treatment.

Reasons for Failed Implants

The main reasons for failed implants are the patient’s health status, the surgical technique used by the dentist, and the risk of infection. Thus, this situation arises from a combination of many factors. An implant’s failure can be due to the patient, the application, or the quality of the implant itself.

Some reasons include:

• Diabetes and diseases causing immune deficiency

• Insufficient bone quality or volume

• Premature loading of the implant

• 牙龈疾病

• Existing infection in the body

• 吸烟

• Incorrect surgical procedures

• Excessive load on the implant

• Allergic reactions

• 口腔卫生不良

• Improper implant placement and angle

How Many Days Does It Take for a Failed Implant to Become Apparent?

Failure usually becomes apparent within 4-8 weeks, and sometimes after several months. Therefore, it can be termed early-stage failure and late-stage failure. The success of an implant is clearly understood within 1-2 months after placement. This period is the most critical stage for bone integration.

• Early-Stage Failure: Most often becomes apparent within the first few weeks after implant placement. This indicates that the implant has not properly integrated with the bone.

• Late-Stage Failure: This can occur years after the implant has successfully integrated with the bone. It typically develops due to bone loss around the implant and excessive load.

Symptoms of Failed Implants

Pain, infection, and bone loss around the implant are the most common signs of failure. Symptoms can vary depending on when the problem appeared (early or late stage) and the underlying cause. Nevertheless, if any of these symptoms are encountered, a dentist should be consulted without delay.

Symptoms generally include:

• Pain and discomfort

• Swelling and inflammation

• Implant mobility

• Inflamed discharge or bad odor

• Gum recession and exposure of the implant

• 咀嚼困难

• Numbness or tingling

疼痛与不适感

A pain that starts mildly in the implant area but intensifies over time and becomes constant may be felt. This pain can increase during chewing. However, persistent and severe pain is not normally expected after a successful implant treatment. Only mild sensitivity might occur during the first few days.

Swelling and Inflammation

Redness, swelling, or tenderness may be observed in the gums around the implant. This could be a sign of inflammation. Sometimes, abscess formation is also seen, indicating the presence of a more serious infection.

Implant Mobility

This is one of the clearest and most definitive signs that an implant has failed. Shaking, trembling, or observing movement when the implant is lightly touched indicates that it has not sufficiently integrated with the bone. Therefore, in this situation, the implant may need to be removed.

Inflamed Discharge or Bad Odor

Purulent or foul-smelling discharge coming from the surrounding teeth and gums around the implant usually indicates the presence of active inflammation. This can result from insufficient oral hygiene or bacterial accumulation around the implant.

Gum Recession and Exposure of the Implant

Recession of the surrounding gums can cause the metal surface or screw of the implant to become visible. This is not just an aesthetic problem; it can lead to infection as the implant surface becomes more exposed to bacterial plaque.

Difficulty Chewing

If the prosthesis (crown, bridge) placed on the implant does not fit perfectly, if pain is felt during chewing, or if strong chewing cannot be performed in the implant area, it could also be a sign of a problem.

Numbness or Tingling

Although rare, nerve damage during or after implant placement can cause numbness and tingling sensations in the lips, jaw, or tongue. While this condition may not be permanent, it is a symptom that needs to be evaluated as soon as possible.

How Is a Failed Implant Corrected?

Treatment includes infection control, implant removal if loose, and replanning steps. However, to achieve a successful intervention, the cause of the failure must first be identified. Early-stage failures are mostly due to infection and insufficient bone integration. In this case, the implant may need to be removed, the area cleaned, and bone tissue regenerated. For late-stage failures, the treatment plan varies according to the degree of infection.

Applied treatments include:

• Antibiotic Treatment: Antibiotics can be used orally or locally to control the infection.

• Laser Therapy or Surgical Procedure: Infected tissues may need to be cleaned, and the implant surface disinfected. In advanced cases, bone grafting may be applied to areas with bone loss.

• Implant Removal: If the infection cannot be controlled or if bone loss is too extensive, removing the implant may be the only option.

• Re-Implant Planning: When the area shows sufficient healing, a new implant of appropriate diameter and length is placed.

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